158 lines
4.6 KiB
PHP
158 lines
4.6 KiB
PHP
<?php
|
|
/**
|
|
* @author Gasper Kozak
|
|
* @copyright 2007-2011
|
|
|
|
This file is part of WideImage.
|
|
|
|
WideImage is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
WideImage is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with WideImage; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
* @package Internal/Operations
|
|
**/
|
|
|
|
/**
|
|
* An Exception for when an invalid fit method is passed
|
|
*
|
|
* @package Internal/Operations
|
|
*/
|
|
class WideImage_Operation_InvalidFitMethodException extends WideImage_Exception {}
|
|
/**
|
|
* An Exception for when an invalid resize dimensions are passed
|
|
*
|
|
* @package Internal/Operations
|
|
*/
|
|
class WideImage_Operation_InvalidResizeDimensionException extends WideImage_Exception {}
|
|
|
|
/**
|
|
* Resize operation class
|
|
*
|
|
* @package Internal/Operations
|
|
*/
|
|
class WideImage_Operation_Resize
|
|
{
|
|
/**
|
|
* Prepares and corrects smart coordinates
|
|
*
|
|
* @param WideImage_Image $img
|
|
* @param smart_coordinate $width
|
|
* @param smart_coordinate $height
|
|
* @param string $fit
|
|
* @return array
|
|
*/
|
|
protected function prepareDimensions($img, $width, $height, $fit)
|
|
{
|
|
if ($width === null && $height === null)
|
|
{
|
|
$width = $img->getWidth();
|
|
$height = $img->getHeight();
|
|
}
|
|
|
|
if ($width !== null)
|
|
$width = WideImage_Coordinate::fix($width, $img->getWidth());
|
|
|
|
if ($height !== null)
|
|
$height = WideImage_Coordinate::fix($height, $img->getHeight());
|
|
|
|
if ($width === null)
|
|
$width = floor($img->getWidth() * $height / $img->getHeight());
|
|
|
|
if ($height === null)
|
|
$height = floor($img->getHeight() * $width / $img->getWidth());
|
|
|
|
if ($width === 0 || $height === 0)
|
|
return array('width' => 0, 'height' => 0);
|
|
|
|
if ($fit == null)
|
|
$fit = 'inside';
|
|
|
|
$dim = array();
|
|
if ($fit == 'fill')
|
|
{
|
|
$dim['width'] = $width;
|
|
$dim['height'] = $height;
|
|
}
|
|
elseif ($fit == 'inside' || $fit == 'outside')
|
|
{
|
|
$rx = $img->getWidth() / $width;
|
|
$ry = $img->getHeight() / $height;
|
|
|
|
if ($fit == 'inside')
|
|
$ratio = ($rx > $ry) ? $rx : $ry;
|
|
else
|
|
$ratio = ($rx < $ry) ? $rx : $ry;
|
|
|
|
$dim['width'] = round($img->getWidth() / $ratio);
|
|
$dim['height'] = round($img->getHeight() / $ratio);
|
|
}
|
|
else
|
|
throw new WideImage_Operation_InvalidFitMethodException("{$fit} is not a valid resize-fit method.");
|
|
|
|
return $dim;
|
|
}
|
|
|
|
/**
|
|
* Returns a resized image
|
|
*
|
|
* @param WideImage_Image $img
|
|
* @param smart_coordinate $width
|
|
* @param smart_coordinate $height
|
|
* @param string $fit
|
|
* @param string $scale
|
|
* @return WideImage_Image
|
|
*/
|
|
function execute($img, $width, $height, $fit, $scale)
|
|
{
|
|
$dim = $this->prepareDimensions($img, $width, $height, $fit);
|
|
if (($scale === 'down' && ($dim['width'] >= $img->getWidth() && $dim['height'] >= $img->getHeight())) ||
|
|
($scale === 'up' && ($dim['width'] <= $img->getWidth() && $dim['height'] <= $img->getHeight())))
|
|
$dim = array('width' => $img->getWidth(), 'height' => $img->getHeight());
|
|
|
|
if ($dim['width'] <= 0 || $dim['height'] <= 0)
|
|
throw new WideImage_Operation_InvalidResizeDimensionException("Both dimensions must be larger than 0.");
|
|
|
|
if ($img->isTransparent() || $img instanceof WideImage_PaletteImage)
|
|
{
|
|
$new = WideImage_PaletteImage::create($dim['width'], $dim['height']);
|
|
$new->copyTransparencyFrom($img);
|
|
if (!imagecopyresized(
|
|
$new->getHandle(),
|
|
$img->getHandle(),
|
|
0, 0, 0, 0,
|
|
$new->getWidth(),
|
|
$new->getHeight(),
|
|
$img->getWidth(),
|
|
$img->getHeight()))
|
|
throw new WideImage_GDFunctionResultException("imagecopyresized() returned false");
|
|
}
|
|
else
|
|
{
|
|
$new = WideImage_TrueColorImage::create($dim['width'], $dim['height']);
|
|
$new->alphaBlending(false);
|
|
$new->saveAlpha(true);
|
|
if (!imagecopyresampled(
|
|
$new->getHandle(),
|
|
$img->getHandle(),
|
|
0, 0, 0, 0,
|
|
$new->getWidth(),
|
|
$new->getHeight(),
|
|
$img->getWidth(),
|
|
$img->getHeight()))
|
|
throw new WideImage_GDFunctionResultException("imagecopyresampled() returned false");
|
|
$new->alphaBlending(true);
|
|
}
|
|
return $new;
|
|
}
|
|
}
|